Headers Question

[BIMMERGUY91]

Hey I was wondering if you guys think I would still notice good performance gains by swapping to the Euro headers but keeping the rest of my exhaust stock. I just really dont want a loud ass exhaust

[sabbanick]

Changing headers will net you the most gains but requires most effort to get running right.

[BIMMERGUY91]

running right because of cats and O2 sensors etc? I was thinking about doing headers and tune at the same time

[sabbanick]

Yeah you will have to move the rear/post catalytic o2 sensors to the section one. Pal posted an awesome DIY of the install, sure you have seen it already.

[Jumbosock]

Yes it would be noticeable. You would have to relocate the post cat sensors and weld in a bung for the EGT sensor. Like in the following thread:

http://www.zpost.com/forums/showthre...t=euro+headers

[kcdedric]

Yes, there are definitely noticeable performance gains to be had while keeping the rest of the exhaust system stock. The stock headers are the most restrictive part of our exhaust setup, so the gains from doing the rest of the exhaust won't be nearly as big. As others will tell you, the stock mufflers on our cars are not very restrictive.

Think of it this way: Headers for power and some sound, the rest of the system for sound/minimal power.

I recently installed headers, so my thread might help you with some info: http://www.zpost.com/forums/showthread.php?t=610756

I unfortunately still haven't had time to relocate my post-cat O2's, but as far as I know everyone who has done the relocation is SES light free.

[BIMMERGUY91]

Sweet. I think I will just invest in some headers and leave my stock exhaust then. Thanks guys